Mitsubishi Heavy Industries, Ltd. (MHI) and Marubeni Corporation (Marubeni) have jointly received an order for two sets of a steam turbine and generator, 1,000 megawatts (MW) each, for ultra-super-critical-pressure (USC)* coal-fired power generation units of Korea East-West Power Co., Ltd. (EWP).

The two turbine/generator sets will be installed in the Unit 9 and 10 power plants under construction at EWP's existing Dangjin Coal Fired Power Complex and will serve to meet increasing electricity demand associated with the country's economic growth. Delivery of the turbines and generators is slated to begin in 2013.

MHI and Marubeni participated in the bidding process as a consortium. MHI will take charge of supplying the turbine/generator sets and Marubeni will be responsible for their transport and for provision of auxiliary equipment. MHI will manufacture the turbines in-house while Mitsubishi Electric Corporation will provide the generators. MHI and Marubeni believe that the high evaluation accorded by EWP to the reliability and economic efficiency of MHI's large-size turbine, in which today's most advanced technologies have been incorporated, coupled with the two companies' abundant delivery track record, resulted in winning of the order.

The Dangjin Coal Fired Power Complex is located approximately 70 kilometers southwest of Seoul. Units 9 and 10 under construction represent Korea's first 1,000 MW USC power generation systems and the country's largest coal-fired power plants ever built. [Native Advertisement]EWP is one of six electricity generating companies spun off from Korea Electric Power Corporation (KEPCO) in 2001 in line with the Korean government's power industry privatization policy. EWP presently has a power generation capacity of 9,500 MW, approximately 13% of the nation's total capacity.

The USC power generating system, which uses very high-temperature and high-pressure steam, enables more fuel-efficient (relative to power output) and environment-friendly power generation compared with other forms of coal-fired power generation. Today, the USC system is being adopted by an increasing number of developed nations. MHI has already delivered 13 USC units in Japan and other countries, but the new Korean order marks the company's first export of USC components exceeding 1,000 MW.

Previously, in 2007 MHI and Marubeni jointly received an order for a gas turbine combined-cycle (GTCC) power generation plant for the Gunsan power station of Korea Western Power Co., Ltd. (KOWEPO). Many projects to build new large-scale power generation plants are currently planned in Korea, and MHI will actively seek to receive related orders. In doing so, through the provision of highly efficient power generation systems the company aspires to contribute to stable electricity supplies and to the achievement of a low-carbon society globally.

*Super-critical-pressure turbines are engineered to operate at steam pressures above water's critical point: 22.1MPa (about 220 times greater than normal atmospheric pressure) and 374.2°C (705.2°F/647.15°K). In actual use, they will operate in an environment of about 250 times atmospheric pressure and 566°C. In the case of ultra-super-critical-pressure units, the temperature will be further raised to 593°C.

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